feat: typescript migration

[simlu]

No description provided.

[simlu]

There is more work to be done here obviously, but I'm trying to get the basics to work:

1. coverage works fine with yarn tsv ✔️
2. the index.d.ts appears to be missing the exported function declaration... I have no idea why that is ✔️
3. figure out eslint ❌
4. figure out better declaration (should detail which options can be passed) ❌
5. some settings are clearly incorrect and need to be fixed ❌

[yurist38]

I suspect that little refactoring here can help to fix the issue with the missed exported function. Try to use this format here:

export default (tree: object, opts: object = {}) => { ... }

Also, note that the object is lowercased, all TS types are written in lowercase.

[simlu]

This workedfor building, however now I can no longer run my tests. I'm assuming this is because exports["default"] = _default; in the output file.

I'm also a bit confused on Object vs object vs {} in combination with eslint Reference. Eslint does not like : object

[simlu]

Ok, I got this working now by fixing the import sytax in the test. It seems that eslint is currently badly misconfigured, so will have to fix that next.

[yurist38]

When you write Object you refer to JS Object class. And when it is written as object this refers to TS type of plain object with nested props.

[yurist38]

Try to use here CommonJS value instead of none. It's responsible for the output format.

[simlu]

Updated the initial comment with outstanding tasks

[simlu]

closing this for now, typescript support is still very much planned

[simlu]

@yurist38 I'm doing another attempt at this! You've been very helpful before, and I'd really appreciate if you could take a look at #1072

I'm kind of stuck, getting: Parsing error: "parserOptions.project" has been set for @typescript-eslint/parser

While that error in theory should be easy to resolve - it somehow isn't.

[yurist38]

I've reviewed your PR, please take a look at my comments. Maybe if you get back to the JSON file, the error will disappear.